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Modélisation, réalisation et commande d'un système de micro-manipulation sans contact par diélectrophorèse

Abstract : Micro and nano-particles can be trapped by a non uniform electric field through the effect of dielectrophoretic (DEP) principle. Dielectrophoresis is used to separate, manipulate and detect micro particles in several domains, such as in biological or Carbon Nano-Tubes (CNTs) manipulations. To study and simulate a vision based closed loop control law in order to control the trajectory of micro objects using DEP a numeric model is required. Current methods to simulate the trajectory of micro-particles under a DEP force field are based on finite element modeling (FEM) which requires new simulations when one of its parameters, like the electric voltage, is changed, or on analytic equations which is limited to very simple geometries. In the first section of this manuscript, we propose a hybrid method between analytic and numeric calculation able to simulate complex geometries and to easily change electrode voltage along the trajectory. This numeric model is, then, validated by comparing it with several experimental results. Finally, a control strategy based on the generalized predictive control method is proposed with the aim of controlling the trajectory, taking advantage of the high dynamics despite the non linearity. This control law has been validated by simulation and compared to classical control strategy.
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Submitted on : Friday, July 13, 2012 - 2:35:41 PM
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  • HAL Id : tel-00717717, version 1

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Mohamed Kharboutly. Modélisation, réalisation et commande d'un système de micro-manipulation sans contact par diélectrophorèse. Autre. Université de Franche-Comté, 2011. Français. ⟨NNT : 2011BESA2003⟩. ⟨tel-00717717⟩

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